8 GMC Premium Infotainment with Navigation | AT4 Premium Package | Gooseneck/5th Wheel Package | Bose® Premium Sound System | Multicolor Head-Up Display | HD Surround Vision | Power Sunroof | Heated & Ventilated Front Seats The 2023 GMC Sierra 3500HD Crew Cab 4WD AT4 blends premium off-road refinement with heavy-duty capability, asserting its presence with an Onyx Black exterior and an exclusive Jet Black leather interior accented by Kalahari details. Beneath its bold exterior, a powerful Duramax 6.6L V8 Turbo Diesel engine works alongside an Allison 10-speed automatic transmission. Built to conquer shifting Canadian seasons, this heavy-duty machine is rated for a 12,100 lb (5,488 kg) GVWR with a 3.42 rear axle ratio and a 2-speed Autotrac transfer case. Ready for serious commercial use or recreation, it comes equipped with a Gooseneck/5th Wheel Package, factory upfitter switches, a high idle switch, a Snow Plow Prep Package, and a factory spray-on bedliner with the AT4 logo. The exterior stands out with signature red front recovery hooks, a GMC MultiPro Tailgate, side bedsteps, LED roof marker lamps, and power-retractable assist steps with built-in perimeter lighting. Inside, the cabin layout transitions into an advanced, luxury-focused workspace dominated by the AT4 Premium Package. An 8 HD touchscreen infotainment center features navigation, wireless Apple CarPlay, and wireless Android Auto, playing through a premium Bose® sound system. Drivers are treated to a multicolor Head-Up Display, an 8 digital driver information center, a Rear Camera Mirror, and a power sunroof. Tailored for all-weather comfort across Alberta, the interior features dual-zone climate control, a heated wrapped steering wheel, heated rear outboard seats, and 10-way power-adjustable front bucket seats that are both heated and ventilated. Trailering is completely simplified with the ProGrade Trailering System, an integrated brake controller, trailer tire pressure monitoring sensors, a Bed View Camera, and HD Surround Vision. Absolute peace of mind on the highway comes from an integrated driver assistance network, combining Lane Change Alert with Side Blind Zone Alert, Rear Cross Traffic Alert, Forward Collision Alert, and Lane Departure Warning. Stock #T4248420A AMVIC LICENSED DEALER